Ukraine's The Fourth Law signs memorandum of understanding with Lithuanian RSI Europe to produce thousands of drones
Paris, France – June 18, 2026 – At Eurosatory, the world’s largest defence technology exhibition held in France, Ukrainian defence technology developer The Fourth Law (TFL) signed a memorandum of understanding (MoU) with Lithuanian defence technology company RSI Europe, agreeing to develop joint drone manufacturing in Lithuania under the “Build with Ukraine” framework.
The memorandum was signed by RSI Europe co-founder and CEO Tomas Milašauskas and The Fourth Law Director of UAS Business Unit Yaroslav Tkachuk.
The memorandum of understanding provides that RSI Europe will prepare manufacturing facilities and, drawing on technologies developed by TFL, will produce thousands of drones. Priority in hiring personnel for the production of these drones will be given to Ukrainian citizens
“The partnership with TFL, leaders in the integration of computer vision and artificial intelligence into drone control, is important both for strengthening Ukraine’s combat capability and for developing the modern battlefield ready capabilities of NATO’s eastern flank,” says T. Milašauskas.
Under the memorandum of understanding, TFL would support the project with drone manufacturing and artificial intelligence technologies (to take place once the necessary conditions are met). TFL would also provide ongoing battlefield feedback to support technological improvements and keep the products relevant throughout their production lifecycle.
“This partnership under the ‘Build with Ukraine’ project is aligned with Ukraine’s national interests to strengthen defence technology supply chains for Ukraine and contribute to the security of Eastern Europe. We are pleased to open a possibility to collaborate with a company that has already demonstrated its ability to produce high-quality defence technologies at scale and maintain constant contact with Ukrainian soldiers,” says Yaroslav Tkachuk.
About RSI Europe
RSI Europe is a Lithuanian defence technology company developing FPV drone systems, remote initiation systems, and military capability integration solutions. Founded in 2022, the company works closely with Ukrainian frontline units to create combat-proven technologies shaped by real battlefield experience. Its flagship products, the Shpak FPV drone system and RISE-1 Remote Initiation System, are currently used by Ukraine, NATO members, and allied nations. RSI Europe’s mission is to help Ukraine achieve victory while strengthening the defence capabilities of NATO and its partners.
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About The Fourth Law
The Fourth Law (TFL) is an autonomous robotics company focused on scalable autonomy for defense. Founded in Kyiv in 2023 by serial entrepreneur Yaroslav Azhnyuk together with a team of engineers, operators, and veterans, TFL operates in Ukraine, the EU, and the United States.